Yield and Nitrogen Fertilizer Efficiency Analyzes in Different Planting Dates of Canola (Brassica napus L.) under Warm and Dry Climate Condition


1 Seed and Plant Improvement Department, Khuzestan Agricultural and Natural Resources Research and Education Center, AREEO, Ahvaz, Iran.

2 Soil and Water Research Department, Khuzestan Agricultural and Natural Resources Research and Education Center, AREEO, Ahvaz, Iran.

3 Young Researchers and Elite Club, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.


Canola sensitivity to delayed sowing date should be managed in such a way that the observance of crop rotation with less reduced in seed yield. The research was conducted to evaluate the yield variation of Hyola401 hybrid, affected by sowing date and nitrogen fertilizer treatments. In this study, the effect of planting date and different levels of nitrogen fertilizers on effective characteristics of canola yield were carried out by combined analysis split plot experiment based on randomized complete blocks design in two consecutive years with four replication. Main plot included different planting date (10-Nov, 20-Nov, 1-Dec, 10-Dec.) and four level of nitrogen fertilizers (0, 50, 100, 150, 200 kg.ha-1) belonged to sub plots. The results indicated that canola yield affected by planting date, is subject the linear relationship Y= 2693.0-36.05D (Y= yield and D=planting dates) so crop yield 3.1% decreased per each day delay in planting date. Canola yield in different level of nitrogen treatments was subjected non-liner relation Y=1360.5-0.17N2-0.00063N3 accordingly, most efficiency in the treatment of 100 and 150 kg of nitrogen fertilizer were found. Estimate yield affected by planting date and nitrogen fertilizer based on the relation Y= 1654-36.1D + 10.4N indicated per every day the sowing is delayed about 36.1 kg of seed yield reduction occurs, so to compensate mentioned reduction in the range of studied planting date about 10.4 kg of nitrogen fertilizer should be consumed. Determining the correlation coefficient between yield and its components by using interaction effect of sowing date and nitrogen fertilizer revealed that the number of pods per plants and seed weight had more correlation with the seed yield trait, which is indicated significant effect of the implemented treatments on these two components of yield. 


Abdoli, P., A. Siadat, Gh. Fathi. and A. Farshadfar. 2004. Effect of planting date on yield and yield components and oil yield of canola cultivars in Kermanshah. J. Agric. Sci. 27: 105- 118. (Abstract in English)
Al-Barrak, K. M. 2006. Irrigation interval and nitrogen level effects on growth and yield of canola (Brassica napus L.). J. Basic Appl. Sci. 7: 87-103.
Auld, D. L., B. L. Bettis. and M. G. Dial. 1985. Planting date and cultivar effect on winter rape production. Agron. J. 6: 197-200.
Berry, P. 2009. Breeding for improved nitrogen use efficiency in oilseed rape, European Workshop. N fertilization of winter oilseed rape, 23–24 March. Berlin. Germany.
Brennan, R. F., M. G. Mason. and G. H. Walton 2000. Effect of nitrogen fertilizer on the concentrations of oil and protein in canola (Brassica napus L.) seed. J. Plant Nutr. 23: 339-348.
Degenhart, D. F. and Z. P. Kondra. 1981. The influence of seeding date and seeding rate on seed yield and yield components of five genotypes of (Brassica napus L.). Canadian J. Plant Sci. 61: 175-183.
Faraji, A., N. Latifi, A. Soltani. and A. H. Shiranirad. 2009. Seed yield and water use efficiency of canola (Brassica napus L.) as affected by high temperature stress and supplemental irrigation. Agric. Water Manage. J. 96: 132- 140.
Ferre, I., M. G. Robertson, G. H. Walton. and S. Asseng. 2002. Simulating phenology and yield response of canola to sowing date in Western Australia. Aust. J. Agric. Res. 53: 1155-1164.
Ghalibaf, M., H. Alyari. and K. Golozani. 2000. Different sowing date effects on yield and yield component of four autumn canola cultivars. J. Agric. Sci. 10(1): 55-62. (Abstract in English)
Hocking, P. J. and M. Stapper. 2001. Effect of sowing time and nitrogen fertilizer on canola and wheat on Indian mustard. Aust. J. Agric. Res. 52: 633-644.
Hopkins, W. G. and N. P. A. Hunter. 2004. Introduction to Plant Physiology. 3rd Ed. John Wiley and Sons Inc. New York. USA. ISBN: 978-0-471- 38915-6. 576 pp.
Jackson, G. D. 2000. Effects N and S on canola yield and nutrient uptake. Agron. J. 92: 644-649.
Jenkins, P. D. and M. H. Leitch. 1986. Effects of sowing date on the growth and yield of winter oilseed rape (Brassica napus L.). J. Agric. Sci. 105: 405– 420.
Malakouti, M. J., A. Bybordi, M. Lotfollahi, A. A. Shahabi, K. Siavoshi, R. Vakil, J. Ghaderi, J. Shahabifar, A. Majidi, A. R. Jafarnajadi, F. Dehghani, M. H. Keshavarz, M. Ghasemzadeh, R. Ghanbarpouri, M. Dashadi, M. Babaakbari. and N. Zaynalifard. 2008. Comparison of complete and sulfur coated urea fertilizers with preplant urea in increasing seed yield and nitrogen use efficiency in wheat. J. Agric. Sci. Tech. 10: 173-183.
Mendham, N. J., J. Russel. and N. K. Jarosz. 1990. Response to sowing time of three contrasting Australian cultivars of oilseed rape (Brassica napus L.). J. Agri. Sci. 114: 275-283.
Mendham, N. J., P. A. Shipway. and R. K. Scott. 1981. The effect of delayed sowing and weather on growth, development and yield of winter oil seed rape. J. Agric. Sci. 97: 389-415.
Nykiforuk, C. L. and A. M. Johnson Flanagan. 1994. Germination and early seedling development under low temperature in canola. Crop Sci. J. 34: 1047-1057.
Ozturk, O. 2010. Effects of source and rate of nitrogen fertilizer on yield, yield components and quality of winter rapeseed (Brassica napus L.). Chilean J. Agric. Res. 70: 132-141.
Pasban-Eslam, B. 2011. Study of possibility of delayed planting of oilseed rape (Brassica napus L.) in east Azerbaijan in Iran. Seed and plant Improvement. J. 27(3): 269-284. (Abstract in English)
Rabiee, M., M. M. Karimi. and F. Safa. 2004. Effect of planting date on seed yield and agronomic traits of rapeseed cultivars as the second crop after rice in Kuchesfahan. Iranian J. Agri. Sci. 35(1): 187-177. (Abstract in English)
Rahnama, A. A. 2010. Effect of sowing date on the yield and yield components of two canola cultivars in Khuzestan area. Modern Sci. Sust. Agri. J. 6(20): 13-22. (Abstract in English)
Rahnama, A. A. and A. Jafarnejady. 2009. Determination of optimum nitrogen levels in different planting dates of canola in Khuzestan. Plant Prod. (Sci. J. Agri.). 32(1): 53-63. (Abstract in English)
Rathke, G. W., O. Christen. and W. Diepenbrock. 2005. Effects of nitrogen source and rate on productivity and quality of winter oilseed rape (Brassica napus L.) grown in different crop rotations. J. Field Crops Res. 94: 103-113.
Robertson, M. J. and J. F. Holland. 2004. Production risk of canola in the semi-arid subtropics of Australia. Aust. J. Agri. Res. 55: 525-538.
Saran, G. and G. Giri. 1987. Influence of dates of sowing on Brassica species under semi-arid rainfed conditions of Northwest India. J. Agri. Sci. 108: 561-566.
Scarisbrick, D. H., R. W. Daniels. and M. Alcock. 1981. The effect of sowing date on yield and yield components of spring oilseed rape. J. Agri. Sci. 97: 189-195.
Sieling, K. and H. Kage. 2006. N balance as an indicator of N leaching in an oilseed rape-winter wheat-winter barley rotation. Agri. Eco-syst. Environ. J. 115: 261–269.
Taylor, A. J. and C. J. Smith. 1992. Effect of sowing date and seeding rate on yield and yield components of irrigated canola (Brassica napus L.) growing on a red brown earth in south- eastern Australia. Aust. J. Agric. Res. 43: 1929-1941.
Thurling, N. 1974. Morphophysiological determinants of yield in rapeseed (Brassica campestris L. and Brassica napus L.). Yield components. Aust. J. Agric. Res. 25: 711-721.
White, C., S. Roques. and P. Berry. 2015. Effects of foliar applied nitrogen fertilizer on oilseed rape (Brassica napus L.). J. Agri. Sci. 153: 42-55.
Whitfield, D. M. 1992. Effect of temperature on colza exchange of pod of oil seed rape. J. Field crops Research. 22: 4 -10.